If you find out, let me know, I have a D70 Gm and can get some type of posi/locker out of a Dodge for next to nothing. I would think they are the same, but have to check on shaft size, spline sount, etc.
I called Randys Ring and Pinion for you and they said there are several different 70's. Find out what year and application the 70 is and what the locker is for and give them a call they dont the seem to mind questions. The differences being bearing sizes and spline count.
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